In other words, the intensity of the emitted light from a surface per unit area in a particular direction can be considered for luminances definition. On the other hand, luminance is a measure to describe the perceived brightness of a color (Encyclopædia Britannica: "luminance, or visually perceived brightness"). The color of the Luminance is a certain color that can be defined by hue (0 o - 360°), saturation (0% - 100%) and lightness (0% - 100%). The SI unit is candela per square meter, which is still sometimes called a nit. Luminance is the intensity that is measured on a surface at a specific position. Luminance describes the amount of light that passes through, is emitted from, or is reflected from a particular area, and falls within a given solid angle. Luminance is the luminous intensity per unit area projected in a given direction. A pattern of varying luminance can be seen, when we look at the world. Luminance is the apparent brightness of an object that appears to the human eye.
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